Character mistake: While looking at a doctored photo of Lincoln and his mother, Lincoln mentions that Michael was born in 1976, but at the end of "Killing Your Number", it reads on Michael's grave stone that he was born in 1974.
Character mistake: Mahone is very smart and meticulous, similar to Schofield. He has a good knowledge of forensics as shown throughout the show. However he shoots Tweener, and places the gun in his hands after shooting him. He would know that the blood on Tweeners hands would show he wasn't holding the gun when he was killed due to blood spatter behind behind the weapon. (00:40:20)
Riots, Drills and the Devil: Part 1 - S1-E6
Character mistake: Before the riot breaks out in Sick Bay, Dr. Tancredi calls the black inmate "Kwame." The inmate in question is credited simply as "Stroker." "Kwame" is in fact the actor's real first name - Kwame Amoaku. (00:24:15)
Character mistake: When C-Note is using the woman's computer on the train, the Army website says "Access my be denied to some parts of this site" instead of "Access MAY be denied." (00:21:00)